From df4c19c113fe9da9eb9d892ca92f6e12e808765b Mon Sep 17 00:00:00 2001
From: Bill Zissimopoulos <billziss@navimatics.com>
Date: Tue, 19 Apr 2022 15:21:54 +0100
Subject: [PATCH] sys: FSP_FILE_NODE_NO_PGIO

---
 src/sys/driver.h |  1 +
 src/sys/file.c   | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/src/sys/driver.h b/src/sys/driver.h
index fc9787d6..e1c9447f 100644
--- a/src/sys/driver.h
+++ b/src/sys/driver.h
@@ -1434,6 +1434,7 @@ NTSTATUS FspVolumeWork(
     PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 
 /* file objects */
+#define FSP_FILE_NODE_NO_PGIO
 #define FspFileNodeKind(FileNode)       \
     (((FSP_FILE_NODE *)FileNode)->Header.NodeTypeCode)
 #define FspFileNodeIsValid(FileNode)    \
diff --git a/src/sys/file.c b/src/sys/file.c
index 1c07c7c6..d654cbdf 100644
--- a/src/sys/file.c
+++ b/src/sys/file.c
@@ -407,8 +407,10 @@ VOID FspFileNodeAcquireSharedF(FSP_FILE_NODE *FileNode, ULONG Flags)
     if (Flags & FspFileNodeAcquireMain)
         ExAcquireResourceSharedLite(FileNode->Header.Resource, TRUE);
 
+#if !defined(FSP_FILE_NODE_NO_PGIO)
     if (Flags & FspFileNodeAcquirePgio)
         ExAcquireResourceSharedLite(FileNode->Header.PagingIoResource, TRUE);
+#endif
 
     FSP_FILE_NODE_SET_FLAGS();
 }
@@ -432,6 +434,7 @@ BOOLEAN FspFileNodeTryAcquireSharedF(FSP_FILE_NODE *FileNode, ULONG Flags, BOOLE
             return FALSE;
     }
 
+#if !defined(FSP_FILE_NODE_NO_PGIO)
     if (Flags & FspFileNodeAcquirePgio)
     {
         Result = ExAcquireResourceSharedLite(FileNode->Header.PagingIoResource, Wait);
@@ -442,6 +445,7 @@ BOOLEAN FspFileNodeTryAcquireSharedF(FSP_FILE_NODE *FileNode, ULONG Flags, BOOLE
             return FALSE;
         }
     }
+#endif
 
     if (Result)
         FSP_FILE_NODE_SET_FLAGS();
@@ -462,8 +466,10 @@ VOID FspFileNodeAcquireExclusiveF(FSP_FILE_NODE *FileNode, ULONG Flags)
     if (Flags & FspFileNodeAcquireMain)
         ExAcquireResourceExclusiveLite(FileNode->Header.Resource, TRUE);
 
+#if !defined(FSP_FILE_NODE_NO_PGIO)
     if (Flags & FspFileNodeAcquirePgio)
         ExAcquireResourceExclusiveLite(FileNode->Header.PagingIoResource, TRUE);
+#endif
 
     FSP_FILE_NODE_SET_FLAGS();
 }
@@ -487,6 +493,7 @@ BOOLEAN FspFileNodeTryAcquireExclusiveF(FSP_FILE_NODE *FileNode, ULONG Flags, BO
             return FALSE;
     }
 
+#if !defined(FSP_FILE_NODE_NO_PGIO)
     if (Flags & FspFileNodeAcquirePgio)
     {
         Result = ExAcquireResourceExclusiveLite(FileNode->Header.PagingIoResource, Wait);
@@ -497,6 +504,7 @@ BOOLEAN FspFileNodeTryAcquireExclusiveF(FSP_FILE_NODE *FileNode, ULONG Flags, BO
             return FALSE;
         }
     }
+#endif
 
     if (Result)
         FSP_FILE_NODE_SET_FLAGS();
@@ -513,8 +521,10 @@ VOID FspFileNodeConvertExclusiveToSharedF(FSP_FILE_NODE *FileNode, ULONG Flags)
 
     FSP_FILE_NODE_GET_FLAGS();
 
+#if !defined(FSP_FILE_NODE_NO_PGIO)
     if (Flags & FspFileNodeAcquirePgio)
         ExConvertExclusiveToSharedLite(FileNode->Header.PagingIoResource);
+#endif
 
     if (Flags & FspFileNodeAcquireMain)
         ExConvertExclusiveToSharedLite(FileNode->Header.Resource);
@@ -534,8 +544,10 @@ VOID FspFileNodeSetOwnerF(FSP_FILE_NODE *FileNode, ULONG Flags, PVOID Owner)
     if (Flags & FspFileNodeAcquireMain)
         ExSetResourceOwnerPointer(FileNode->Header.Resource, Owner);
 
+#if !defined(FSP_FILE_NODE_NO_PGIO)
     if (Flags & FspFileNodeAcquirePgio)
         ExSetResourceOwnerPointer(FileNode->Header.PagingIoResource, Owner);
+#endif
 }
 
 VOID FspFileNodeReleaseF(FSP_FILE_NODE *FileNode, ULONG Flags)
@@ -548,8 +560,10 @@ VOID FspFileNodeReleaseF(FSP_FILE_NODE *FileNode, ULONG Flags)
     FSP_FILE_NODE_GET_FLAGS();
     FSP_FILE_NODE_ASSERT_FLAGS_SET();
 
+#if !defined(FSP_FILE_NODE_NO_PGIO)
     if (Flags & FspFileNodeAcquirePgio)
         ExReleaseResourceLite(FileNode->Header.PagingIoResource);
+#endif
 
     if (Flags & FspFileNodeAcquireMain)
         ExReleaseResourceLite(FileNode->Header.Resource);
@@ -569,6 +583,7 @@ VOID FspFileNodeReleaseOwnerF(FSP_FILE_NODE *FileNode, ULONG Flags, PVOID Owner)
 
     Owner = (PVOID)((UINT_PTR)Owner | 3);
 
+#if !defined(FSP_FILE_NODE_NO_PGIO)
     if (Flags & FspFileNodeAcquirePgio)
     {
         if (ExIsResourceAcquiredLite(FileNode->Header.PagingIoResource))
@@ -576,6 +591,7 @@ VOID FspFileNodeReleaseOwnerF(FSP_FILE_NODE *FileNode, ULONG Flags, PVOID Owner)
         else
             ExReleaseResourceForThreadLite(FileNode->Header.PagingIoResource, (ERESOURCE_THREAD)Owner);
     }
+#endif
 
     if (Flags & FspFileNodeAcquireMain)
     {